Accurate model of arbitrary wire antennas in free space, above or inside ground

Tie Jun Cui, Weng Cho Chew

Research output: Contribution to journalArticle


An accurate model of wire antennas in free space, above or inside lossy ground is presented in which the current is assumed to flow on the surface of the wire and the testing is also performed on the surface. To replace the traditional delta-gap source, a more accurate source model is developed by using the Huygens' principle. From this principle and reciprocity theorem, a variational formulation of the input admittance is derived. When the triangle function is chosen as both basis and weighting functions, all the elements of impedance matrix and source vector are formulated in closed forms, which can be rapidly computed. Several numerical results are given. Comparing with measured data, both the current distribution and input impedance by this model are more accurate than those of delta-gap model.

Original languageEnglish (US)
Pages (from-to)482-493
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Issue number4
StatePublished - Dec 3 2000


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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